# How to do theoretical calculation of S parameters

I created a test bench for bond wire in ADS EM simulator and got the following graph in the picture I attached. I'm trying to compare the values which I got in ADS with theoretical one. But I'm confused how to do calculation of S-parameters in a two port network.

Kindly help me to calculate the S parameters and compare with the practical one.

• something like this? The first hit when I googled 'calculate s-parameters of series impedance'. – Neil_UK Dec 22 '15 at 13:22

Now calculate the forward and reverse-travelling waves at each of the ports. This gives you $S_{11}$ and $S_{21}$.
Then hook up the generator on the other side of the device and calculate the forward and reverse travelling waves again to get $S_{12}$ and $S_{22}$.